Hi, all. Apologies if this has been covered elsewhere, but I dug through the back threads and didn't see a similar problem. OK, so I replaced the battery in my 3G. Phone works great -- but when I plug in the USB cord, it doesn't seem to want to charge. I turn the phone off, take the cord out, then wait a few seconds. When I plug the cord back in, the phone turns back on (i.e., silver Apple logo). Any thoughts as to what is going on here?